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Why DC Combiner Box Is Essential for PV Systems
If you're a solar system buyer, installer, or project manager, let's get straight to the point—you're here because you need a definitive answer: Does your solar system really need a DC combiner box? A
• Overcurrent Protection
Automatically trips when current exceeds the set value to protect circuits.
• High Accuracy
Trip accuracy of ±10% ensures reliable performance.
• Enhanced Safety
Reduces risk of damage or fire caused by overload or short circuit.
• Wide Application
Suitable for electrical distribution and industrial control systems.
| Product Model | ZW32 | ||
| Rated Voltage | 12kV | ||
| Rated Insulation Level | Power-Frequency Withstand Voltage (1 min) |
Dry-type | Phase-to-Ground & Phase-to-Phase: 42 kV; Across Terminals: 48 kV |
| Wet-type | Phase-to-Ground Insulation: 34 kV | ||
| Lightning Impulse Withstand Voltage (Peak) |
Phase-to-Ground, Phase-to-Phase; Across Terminals: 85 kV | ||
| Rated Frequency | 20Hz | ||
| Rated Current | 200~1250A | ||
| Rated Short-Circuit Breaking Current | 12.5/16/20kA | ||
| Rated Short-Circuit Making Current (Peak) | 50kA | ||
| Rated Peak Withstand Current | 50kA | ||
| 4-Second Short-Time Withstand Current | 50kA | ||
| Rated Operating Sequence | 0-0.3s-CO-180s-0 | ||
| Opening Time / Closing Time | 25M-50M/15M-50M | ||
| Rated Number of Short-Circuit Breaking Operations | 30ms | ||
| Mechanical Endurance | 10000 times | ||
| Power-Frequency Withstand Voltage (1 min) for Control & Auxiliary Circuits |
2000 times | ||
| Rated Operating Voltage & Rated Auxiliary Voltage | DC220V/AC220V | ||
| Overcurrent Release | Rated Current | 5 | |
| Tripping Current Accuracy | ±10% | ||
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